Moved ViewerBase class out into its own header and source file.

Improved the support for stats collection in CompositeViewer/StatsHandler.

src/osgViewer/ViewerBase.cpp

@@ -0,0 +1,60 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <osgViewer/ViewerBase>
+
+#include <osg/io_utils>
+
+#include <osg/TextureCubeMap>
+#include <osg/TextureRectangle>
+#include <osg/TexMat>
+
+#include <osgUtil/Optimizer>
+#include <osgUtil/IntersectionVisitor>
+
+using namespace osgViewer;
+
+ViewerBase::ViewerBase():
+    osg::Object(true)
+{
+    _done = false;
+    _keyEventSetsDone = osgGA::GUIEventAdapter::KEY_Escape;
+    _quitEventSetsDone = true;
+    _threadingModel = AutomaticSelection;
+    _threadsRunning = false;
+
+}
+
+ViewerBase::ViewerBase(const ViewerBase& base):
+    osg::Object(true)
+{
+}
+
+void ViewerBase::addUpdateOperation(osg::Operation* operation)
+{
+    if (!operation) return;
+
+    if (!_updateOperations) _updateOperations = new osg::OperationQueue;
+    
+    _updateOperations->add(operation);
+}
+
+void ViewerBase::removeUpdateOperation(osg::Operation* operation)
+{
+    if (!operation) return;
+
+    if (_updateOperations.valid())
+    {
+        _updateOperations->remove(operation);
+    } 
+}